The Institute for Science and International Security said new construction at Yongbyon could allow for twice as many uranium-enriching centrifuges to be installed there.
ISIS: NKorea Expanding Yongbyon Nuclear Site
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Satellite imagery of the Yongbyon Fuel Fabrication plant from July 28, 2013 showing the expansion of the gas centrifuge plant building.
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A couple surrounded by sunflowers kisses outside Schiphol Airport's passenger terminal in Amsterdam, the Netherlands.
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Digital Globe imagery from May 3, 2012 showing building construction in what is the south eastern corner of the fuel fabrication facility.